For one or two of our Windows XP Home Edition profiles (too many kids), but not all profiles, we've been getting a Windows Defender Warning stating WD has "detected programs that might compromise privacy or damage our computer." It names "TrojanDownloader:Win32/Renos.DZ." Paired with this is a 'b.exe' message stating b.exe 'has encountered a problem and needs to close". And, once in a while, we get a "CiceroUIWndFrame: b.exe - Application Error" stating 'the exception unknown software exception (0xe06d7363) occurred in the application at location 0x7c812afb' and/or a "b.exe Application Error" stating the 'instruction at 0x7c910cbd referenced memory at 0x69766f6d. The memory could not be 'read'.'
Our internet (Mozilla) is very slow.
Reading a few threads, I've downloaded MBAM and HJT, scanned, removed threats, and attached logs. Note: when I rebooted after running MBAM (to complete threat removal), the warning and error messages popped-up as if I'd done nothing.
Any help would be appreciated.