Do a Clean Boot to check if software disputes occur on the system.
Begin Windows 7 with a minimum set of drivers and startup programs to assist fix error messages and other problems. This type of startup is called a “clean boot.” A clean boot enables to remove software disputes.
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Log on to your computer with an administrator’s rights account.
In the Start Search box, click Start, type msconfig.exe and then press ENTER to start the System Configuration Utility. If you are asked to enter a password or confirm it, enter your password or press Continue.
To delete the Startup Load items check box, click on Selective Startup on the General tab. (The check box Use Original Boot.ini is inaccessible.)
Click the Hide all Microsoft services check box on the Services tab, then press Disable all.