Hi,
As this issue is occurring after installing few software’s, the issue might be due to some third party programs or some services is causing this issue.
Method 1:
Step 1: I would suggest you to boot the device to safe mode and check.
Windows Startup Settings (including safe mode)
http://windows.microsoft.com/en-us/windows-8/windows-startup-settings-including-safe-mode
Step 2: Clean boot
If you do not face the issue in safe mode, place the computer in clean boot and check for the issue.
How to perform a clean boot in Windows
http://support.microsoft.com/kb/929135
Note: Follow How to reset the computer to start as usual after troubleshooting with clean boot from article KB929135 to reset the computer to normal mode.
Method 2: ****You may also run SFC scan to check if there is any system corrupted files.
Use the System File Checker tool to repair missing or corrupted system files
http://support.microsoft.com/kb/929833/en-us
Also check if there are any errors are listed in Event viewer.
Event logs are special files that record significant events on your computer, such as when a user logs on to the computer or when a program encounters an error.
To open view the logs please follow the steps.
Press Windows key + W
Type "View Event Logs" on the Start screen and hit Enter.
Hope this information helps. Reply with the status so that we could help you further.