Scheduled boot time scan was unable to scan files because CAB file was corrupt

Avast Free Antivirus / Premium Security
21
Would malwarebytes, windows defender, avast scans be able to tell me if I had been hacked?
Probably. Especially repeat scans with a number of different applications. The Windows Firewall is a very good firewall, apart from the limitation of no outbound control. The chances you've had malware install while going online to get yourself an AV are fairly small, with the Windows firewall on. (Had it been off, I'd say the chances were fairly good you'd have some infection.) If there are no symptoms, and repeat scans turn up clean, I personally would not bother about formatting and reinstalling Windows.
22

Got a new file that came up on the avast boot scan:

C:\Document and Settings\HP_Administrator\Local Settings\GLB60.tmp\Wise0003.bin Error42146 {Installer achieve is corrupted}

I looked the file up and couldn’t open w/ any programs I could think of. The properties said it was part of Yahoo! Suite which has the Yahoo! messenger. Should I be concerned about this?

I know that when it says the blank is corrupted it just means Avast is unable to scan it. Why is it unable to scan certain files?

P.S: I tried uninstalling Yahoo Messenger and another boot scanner and the file still came up with the scan.

23

One more question I had Norton originally on this computer. D/Led the tool to remove it after I went into the control panel and uninstalled it there. Does it matter if I’m in safe mode to use the Norton removal tool or not?

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BUMP for the last two questions. I would appreciate any info

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I don’t know for certain (which is the reason I didn’t reply) but I don’t think it matters if the Norton tool is run in safe or normal. (Try both. Can’t do any harm. The second run probably won’t find anything additional, but if it does, let us know.)
The file “GLB60.tmp” would appear to be related to one of the following software vendors:

* SmartDraw.com; SmartDraw 2008; 2008.31 * Stardock Corporation - www.stardock.com; Stardock Central; 2.x * SmartDraw.com; SmartDraw 2007; 1032, 4455, 0, 0 * SpeedBit Ltd.; Download Accelerator Plus (DAP); 9304 (Build 1057
That it's corrupted probably doesn't matter. Being a .tmp file it is probably safe to delete. It probably was a temporary part of the process involving the installation of something..either Yahoo messenger (likely) or one of those listed above (courtesy of Prevx.) Lots of self-installing files leave un-needed stuff behind after they've done their thing. Maybe this case is one of those. Files that cannot be scanned are just that, it's not an indication they are infected. (And most probably aren't.)
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Thanks for the info. I appreciate it a lot. Can you explain why certain files are unable to be read by avast boot scanner?

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I can’t with any authority or knowledge, but some files, often used by other security programs or even MS encrypted files are password protected by their own respective programs, and some might use an unknown compression technique.
Generally if you look at the name and path of a file that’s unable to be scanned, it will reveal enough about why to reassure. (That’s usually my experience. Part of the OS, or Spybot, or similar.)

I have noticed that sometimes a file that Avast can’t scan certain other scanners sometimes can (or claim to scan them); make what you will of that.