My ISP has a 250GB per month limit, after which additional charges apply. My normal usage, until a few weeks ago, had been about 10 to 30GB per month. I had been using SEP 12.1 for protection with good results for a long time.
My employer gives employees a choice of SEP 12.1.5 or McAfee VirusScan Enterprise 8.8 for home use under the company contract. The company had decided to save some money and go with McAfee as of later this year. Because of that, I uninstalled the SEP and installed the McAfee product. It installed with no problem and seemed to be working well. I never noticed any sort of erratic behavior such as my mouse moving on it's own or anything like that. None of my passwords have been changed and I haven't noticed any unauthorized access to any of my accounts or email. I did notice that my web browsing seemed to get increasingly slower day by day.
A few days later I got a notification from my ISP that I was approaching the 250GB limit. I started checking my daily usage and it was registering 25 to 60 GB PER DAY. I started troubleshooting my network and eliminated that as a source of the problem. When I disconnected my router and plugged my computer directly into the modem, the usage INCREASED significantly and my browser slowed to a crawl. I ran full McAfee scans as well as Malwarebyte scans and nothing turned up.
On a hunch, I uninstalled McAfee and reinstalled SEP. Problem resolved. Usage back down to about 1GB per day. I ran a full scan and SEP did not detect anything amiss. I notice that multiple times during the day, a message pops up showing where SEP has blocked svchost.exe. Other than that, I am at a loss as to what was going on when I had the McAfee product installed.
My computer is new and is running Win 7, 64 bit. I have never installed any kind of p2p program on this computer. In guessing at the problem, the only thing I can figure is that there is a rogue p2p program on my computer that SEP is blocking but McAfee allowed to function. However, if there is, I can't seem to find it.
Maybe there is a setting in McAfee that I could have turned on that would have prevented the problem? I don't know.
I will worry that my computer has been compromised until I figure out what was going on. Can anybody help?
Also, I will need to switch to the McAfee product at some point prior to September (or purchase my own personal virus protection for home use). Are there settings in McAfee that would have prevented the problems I had? I'm reasonably certain that I had used the default settings for most everything when I installed McAfee.