Hi there,
You should periodically clear the cache to allow your browser to function more efficiently.
-Press "Windows+R" key on the keyboard to open Run window.
-In the Run window type "wsreset.exe" and then click ok it will clear all the cache in Windows store.
Temporarily disable antivirus software or any security software installed on your computer and try updating the apps.
Perform a clean boot to check if any third party application is causing the issue, as clean boot helps in eliminating software conflicts. Follow these steps given in the link below to start the computer in clean boot.
http://support.microsoft.com/kb/929135
Restart the PC after this and try getting the apps from the store
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