The laptop (Dell E6410) in question contracted a virus which removed all icons under All Programs in the Start menu. I ran tdssKiller which found (RootKit.Boot.SSt.a) and repaird the MBR. Then I was able restored from a previous System Restore point to get the icons back. However, when I try to install MalwareBytes an error appears stating 'Access is Denied' before the process completes and the install rolls back. There appears to be some residual virus issues left over which I am unable to resolve. Thanks in advance for any assistance.