To be specific, my problem is thus. I am running Kaspersky Internet Security 2013 on my computer. However the other night I had a little issue that resulted in Windows Update not seeing me, the only account, as the system admin and rendered me unable to change settings (somehow triggered by running a Vulnerability Scan) cause it claimed that it was managed by the systems admin. As a result I was forced to System Restore to about 5-6 days ago, and ended up having to reinstall Chrome and later my Anti-Virus to get it to work correctly. This issue occurs randomly, however after reinstalling my AV, I went to my AppData folder cause I wondered if reinstalling Kaspersky would have fixed the issue where Explorer.EXE would crash and reboot with a faulting module of Shell32.dll in the error report. I was able to look around... one session before trying again resulted in the problem occurring once more. However Explorer.EXE only crashed when i tried to enter the AppData folder luckily. It does not happen in safe mode. And to fix the issue with the Windows Update, I have had to system restore to before the action that did the thing that caused Windows Update to not recognise me as the system admin.
Despite scanning with Malware Bytes, Rkill, TDSSKiller and Kaspersky, I have found no malware, however I am still suspicious since this stuff keeps happening. I would rather not have to reinstall the entire OS. To be specific my OS is Windows 8 Pro (not Windows 8.1. I have not upgraded to it for fears that it will render me unable to use my computer or play the games I have installed upon it).