Hi,
The problem always starts after this:
2016-01-25 08:55:07:572 964 58c Agent *********** Agent: Initializing Windows Update Agent ***********
2016-01-25 08:55:07:572 964 58c Agent * Prerequisite roots succeeded.
2016-01-25 08:55:07:572 964 58c Agent *********** Agent: Initializing global settings cache ***********
2016-01-25 08:55:07:572 964 58c Agent * WSUS server: <NULL>
2016-01-25 08:55:07:572 964 58c Agent * WSUS status server: <NULL>
2016-01-25 08:55:07:572 964 58c Agent * Target group: (Unassigned Computers)
2016-01-25 08:55:07:572 964 58c Agent * Windows Update access disabled: No
2016-01-25 08:55:07:697 964 58c Agent * Found 1 persisted download calls to restore
2016-01-25 08:55:07:900 964 58c DnldMgr Download manager restoring 0 downloads
2016-01-25 08:55:07:915 964 58c Agent * Successfully loaded 1 persisted download calls.
2016-01-25 08:55:07:931 964 58c AU ########### AU: Initializing Automatic Updates ###########
2016-01-25 08:55:07:931 964 58c AU AU setting next detection timeout to 2016-01-25 06:55:07
2016-01-25 08:55:07:931 964 58c AU # Approval type: Scheduled (User preference)
2016-01-25 08:55:07:931 964 58c AU # Scheduled install day/time: Every day at 3:00
2016-01-25 08:55:07:931 964 58c AU # Auto-install minor updates: Yes (User preference)
2016-01-25 08:55:07:931 964 58c AU # Will interact with non-admins (Non-admins are elevated (User preference))
2016-01-25 08:55:07:962 964 2dc Report *********** Report: Initializing static reporting data ***********
2016-01-25 08:55:07:962 964 2dc Report * OS Version = 6.1.7601.1.0.65792
2016-01-25 08:55:07:962 964 2dc Report * OS Product Type = 0x00000001
2016-01-25 08:55:07:978 964 2dc Report * Computer Brand = Dell Inc.
2016-01-25 08:55:07:978 964 2dc Report * Computer Model = Vostro 1015
2016-01-25 08:55:07:978 964 2dc Report * Bios Revision = A02
2016-01-25 08:55:07:978 964 2dc Report * Bios Name = Phoenix ROM BIOS PLUS Version 1.10 A02
2016-01-25 08:55:07:978 964 2dc Report * Bios Release Date = 2009-09-17T00:00:00
2016-01-25 08:55:07:978 964 2dc Report * Locale ID = 11265
2016-01-25 08:55:08:009 964 58c AU Initializing featured updates
2016-01-25 08:55:08:009 964 58c AU Found 0 cached featured updates
2016-01-25 08:55:08:103 964 58c AU Successfully wrote event for AU health state:0
2016-01-25 08:55:08:103 964 58c AU Successfully wrote event for AU health state:0
2016-01-25 08:55:08:103 964 58c AU AU finished delayed initialization
2016-01-25 08:55:08:103 964 2dc AU #############
2016-01-25 08:55:08:103 964 2dc AU ## START ## AU: Search for updates
2016-01-25 08:55:08:103 964 2dc AU #########
2016-01-25 08:55:08:149 964 2dc AU <<## SUBMITTED ## AU: Search for updates [CallId = {BD1CB0AC-18FA-41B4-951E-85648EA114C2}]
2016-01-25 08:55:08:633 964 a28 Agent *************
2016-01-25 08:55:08:633 964 a28 Agent ** START ** Agent: Finding updates [CallerId = AutomaticUpdates]
2016-01-25 08:55:08:633 964 a28 Agent *********
2016-01-25 08:55:08:633 964 a28 Agent * Online = Yes; Ignore download priority = No
2016-01-25 08:55:08:633 964 a28 Agent * Criteria = "IsInstalled=0 and DeploymentAction='Installation' or IsPresent=1 and DeploymentAction='Uninstallation' or IsInstalled=1 and DeploymentAction='Installation' and RebootRequired=1 or IsInstalled=0 and DeploymentAction='Uninstallation' and RebootRequired=1"
2016-01-25 08:55:08:633 964 a28 Agent * ServiceID = {7971F918-A847-4430-9279-4A52D1EFE18D} Third party service
2016-01-25 08:55:08:633 964 a28 Agent * Search Scope = {Machine}
2016-01-25 08:55:08:680 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\wuredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:08:929 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:08:945 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\TMPDF08.tmp with dwProvFlags 0x00000080:
2016-01-25 08:55:09:023 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:09:039 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\v6-win7sp1-wuredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:09:054 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:10:318 964 a20 AU Triggering AU detection through DetectNow API
2016-01-25 08:55:10:318 964 a20 AU Piggybacking on an AU detection already in progress
2016-01-25 08:55:16:199 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\v6-win7sp1-wuredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:16:199 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:16:199 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\wuredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:16:215 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:16:230 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\TMPFB7E.tmp with dwProvFlags 0x00000080:
2016-01-25 08:55:16:230 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:16:246 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\wuredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:16:246 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:16:261 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\TMPFB9E.tmp with dwProvFlags 0x00000080:
2016-01-25 08:55:16:261 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:16:308 964 a28 Agent Checking for updated auth cab for service 7971f918-a847-4430-9279-4a52d1efe18d at http://ds.download.windowsupdate.com/v11/2/microsoftupdate/redir/v6-muauth.cab
2016-01-25 08:55:16:308 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\AuthCabs\authcab.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:16:308 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:17:728 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\AuthCabs\authcab.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:17:759 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:17:759 964 a28 Setup Checking for agent SelfUpdate
2016-01-25 08:55:17:759 964 a28 Setup Client version: Core: 7.6.7601.19077 Aux: 7.6.7601.19077
2016-01-25 08:55:17:775 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\wuredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:17:775 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:17:790 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\TMP198.tmp with dwProvFlags 0x00000080:
2016-01-25 08:55:17:790 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:17:790 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\v6-win7sp1-wuredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:17:806 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:18:991 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\v6-win7sp1-wuredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:19:007 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:19:007 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\wuredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:19:023 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:19:023 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\TMP679.tmp with dwProvFlags 0x00000080:
2016-01-25 08:55:19:038 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:19:038 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\wuredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:19:054 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:19:054 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\9482F4B4-E343-43B6-B170-9A65BC822C77\TMP699.tmp with dwProvFlags 0x00000080:
2016-01-25 08:55:19:069 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:24:093 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\SelfUpdate\wuident.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:24:108 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:24:108 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\SelfUpdate\TMP1A59.tmp with dwProvFlags 0x00000080:
2016-01-25 08:55:24:124 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:24:139 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\SelfUpdate\wsus3setup.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:24:155 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:24:295 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\SelfUpdate\wsus3setup.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:24:327 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:24:389 964 a28 Setup Determining whether a new setup handler needs to be downloaded
2016-01-25 08:55:24:420 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\SelfUpdate\Handler\WuSetupV.exe with dwProvFlags 0x00000080:
2016-01-25 08:55:24:436 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:24:436 964 a28 Setup SelfUpdate handler update NOT required: Current version: 7.6.7600.320, required version: 7.6.7600.320
2016-01-25 08:55:24:436 964 a28 Setup Evaluating applicability of setup package "WUClient-SelfUpdate-ActiveX~31bf3856ad364e35~x86~~7.6.7600.320"
2016-01-25 08:55:26:682 964 a28 Setup Setup package "WUClient-SelfUpdate-ActiveX~31bf3856ad364e35~x86~~7.6.7600.320" is not applicable
2016-01-25 08:55:26:682 964 a28 Setup Evaluating applicability of setup package "WUClient-SelfUpdate-Aux-TopLevel~31bf3856ad364e35~x86~~7.6.7600.320"
2016-01-25 08:55:26:698 964 a28 Setup Setup package "WUClient-SelfUpdate-Aux-TopLevel~31bf3856ad364e35~x86~~7.6.7600.320" is not applicable
2016-01-25 08:55:26:698 964 a28 Setup Evaluating applicability of setup package "WUClient-SelfUpdate-Core-TopLevel~31bf3856ad364e35~x86~~7.6.7600.320"
2016-01-25 08:55:26:745 964 a28 Setup Setup package "WUClient-SelfUpdate-Core-TopLevel~31bf3856ad364e35~x86~~7.6.7600.320" is not applicable
2016-01-25 08:55:26:745 964 a28 Setup SelfUpdate check completed. SelfUpdate is NOT required.
2016-01-25 08:55:27:759 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\7971F918-A847-4430-9279-4A52D1EFE18D\wuredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:27:790 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:27:790 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\7971F918-A847-4430-9279-4A52D1EFE18D\TMP28BB.tmp with dwProvFlags 0x00000080:
2016-01-25 08:55:27:805 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:27:805 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\7971F918-A847-4430-9279-4A52D1EFE18D\v6-muredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:27:821 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:27:899 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\7971F918-A847-4430-9279-4A52D1EFE18D\v6-muredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:27:915 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:27:915 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\7971F918-A847-4430-9279-4A52D1EFE18D\wuredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:27:930 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:27:946 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\7971F918-A847-4430-9279-4A52D1EFE18D\TMP2949.tmp with dwProvFlags 0x00000080:
2016-01-25 08:55:27:946 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:27:961 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\7971F918-A847-4430-9279-4A52D1EFE18D\wuredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:55:27:961 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:27:977 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\7971F918-A847-4430-9279-4A52D1EFE18D\TMP2969.tmp with dwProvFlags 0x00000080:
2016-01-25 08:55:27:977 964 a28 Misc Microsoft signed: NA
2016-01-25 08:55:27:977 964 a28 PT +++++++++++ PT: Synchronizing server updates +++++++++++
2016-01-25 08:55:27:977 964 a28 PT + ServiceId = {7971F918-A847-4430-9279-4A52D1EFE18D}, Server URL = https://fe2.update.microsoft.com/v6/ClientWebService/client.asmx
2016-01-25 08:55:56:244 964 a28 Driver Matched driver to device PCI\VEN_14E4&DEV_4315&SUBSYS_000C1028&REV_01
2016-01-25 08:55:56:244 964 a28 Driver Status: 0x1802400, ProblemNumber: 0x000016
2016-01-25 08:55:56:244 964 a28 Driver Matched driver to device PCI\VEN_10EC&DEV_8168&SUBSYS_04021028&REV_03
2016-01-25 08:55:56:244 964 a28 Driver Status: 0x1802400, ProblemNumber: 0x000016
2016-01-25 08:56:13:436 964 2dc AU Forced install timer expired for AUInstallType = 4
2016-01-25 08:56:13:436 964 2dc AU UpdateDownloadProperties: 0 download(s) are still in progress.
2016-01-25 08:56:13:436 964 2dc AU Setting AU scheduled install time to 2016-01-26 01:00:00
2016-01-25 08:56:13:436 964 2dc AU Successfully wrote event for AU health state:0
2016-01-25 08:56:27:226 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\7971F918-A847-4430-9279-4A52D1EFE18D\wuredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:56:27:242 964 a28 Misc Microsoft signed: NA
2016-01-25 08:56:27:242 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\7971F918-A847-4430-9279-4A52D1EFE18D\TMP10FA.tmp with dwProvFlags 0x00000080:
2016-01-25 08:56:27:257 964 a28 Misc Microsoft signed: NA
2016-01-25 08:56:27:257 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\7971F918-A847-4430-9279-4A52D1EFE18D\v6-muredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:56:27:273 964 a28 Misc Microsoft signed: NA
2016-01-25 08:56:29:098 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\7971F918-A847-4430-9279-4A52D1EFE18D\v6-muredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:56:29:114 964 a28 Misc Microsoft signed: NA
2016-01-25 08:56:29:114 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\7971F918-A847-4430-9279-4A52D1EFE18D\wuredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:56:29:129 964 a28 Misc Microsoft signed: NA
2016-01-25 08:56:29:129 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\7971F918-A847-4430-9279-4A52D1EFE18D\TMP185B.tmp with dwProvFlags 0x00000080:
2016-01-25 08:56:29:145 964 a28 Misc Microsoft signed: NA
2016-01-25 08:56:29:145 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\7971F918-A847-4430-9279-4A52D1EFE18D\wuredir.cab with dwProvFlags 0x00000080:
2016-01-25 08:56:29:160 964 a28 Misc Microsoft signed: NA
2016-01-25 08:56:29:160 964 a28 Misc Validating signature for C:\Windows\SoftwareDistribution\WuRedir\7971F918-A847-4430-9279-4A52D1EFE18D\TMP187B.tmp with dwProvFlags 0x00000080:
2016-01-25 08:56:29:176 964 a28 Misc Microsoft signed: NA
2016-01-25 08:56:29:176 964 a28 PT +++++++++++ PT: Synchronizing extended update info +++++++++++
2016-01-25 08:56:29:176 964 a28 PT + ServiceId = {7971F918-A847-4430-9279-4A52D1EFE18D}, Server URL = https://fe2.update.microsoft.com/v6/ClientWebService/client.asmx
2016-01-25 08:57:00:735 964 2dc AU Successfully wrote event for AU health state:0
Everytime, after this my PC stuck at "checking for updates" and wuauserv starts to kill CPU