I have recently reformatted my computer using AlienRespawn to factory settings. So far, every software including windows is working fine except McAfee.
I have McAfee Security Center already installed in my factory settings recovery image, so I proceeded to update it like usual but was not able to. (Perhaps it was too outdated)
Anyway, I proceeded to uninstall the existing old McAfee SC (yes, total clean removal including using MCPR) and downloaded a fresh copy from my online account. Everything will work fine until OnAccess Scanner will randomly turn off, causing a pop up to tell me my computer is at risk. After I reenabled it, it will be turned off again sooner or later (sometimes several minutes later, sometimes up to hours later), completely at random. Sometimes On Access Scanner will crash, resulting in windows trying to report the problem for a solution. I've checked Windows Services and I can see McShield (and all other McAfee services) are set to automatic and are all running when it is fine.
I've gone through windows event logs and found that McShield.exe crashed several times and restarted, sometimes with faulting module: netprofm.dll_unloaded, sometimes with faulting module: ole32.dll, sometimes with unknown module.
It seems to me that, when it does crash, it began to restart, and that is when OAS will be turned off, to which I'll try to reenable it without problems. Sometimes though, OAS will turn off immediately after I reenable it, unless I manually start it again through Windows Services. Occasionally, OAS will show up in grey bar trying to restart for some time without success. I will also note that, when this happens, the computer will freeze briefly, almost unnoticeable unless I'm watching streaming media or listening to music (video or music will pause for about 1 second).
The other weird behaviour I notice is that, when OAS is trying to restart, sometimes Mcafee will update itself (scan for update, found update, and proceed to update). It has already done so several times within an hour, which is really abnormal.
I've tried completely remove McAfee and reinstalling twice without success. I've also performed a thorough virus scan which shows up clean. I've also tried MVT, which shows up clean (when OAS is not acting up) but MVT will show that McShield not starting as the only problem when I use MVT at the moment OAS crashes. Also, this is a fresh Windows copy restored from the factory backup, which should not have problems in the first place.
I am running Windows 7 Professional SP1 64-bit with all latest updates, IE 10 and all.
The Windows is a fresh copy (image restored from factory settings backup using AlienRespawn)
Other than this occasional OAS crashing problem, McAfee is working fine. Could this be hardware related or just purely software? As far as I know, my hardware passed all hardware diagnostics, chkdsk shows HDD is fine, memtest (3 full passes) shows memory is fine.
I am at my wits end trying to figure out what's wrong. Please help! Thanks!