well MSE has deproved instead of improving with the passage of time. If you need free anti virus, I recomend avg free
I wouldn't have AVG Internet Security (paid version), let alone their free crap. Newegg gave me a copy of it with a wireless router that I bought. A month or so, I guess, I installed it on XP Pro. It caused BSOD's, and consumed a lot of resources, as well as a lot of time updating.
After a week, I removed it, and threw the install disk, box & license in the garbage, because that was the best place that I could find for it. I wouldn't give it away, because if it's not fit for me to use, I won't push it on anyone else. That's just the way I am.
As far as MSE goes, although I only use it on XP Mode, it's very user friendly on XP, Vista & 7. It even has a control to limit your CPU usage during a scan. I left it at 50%. If only a virus scan were running, it may hit 35%.
You have something else running besides MSE for your CPU to be hitting 99%. Open your Task Manager, you should see what's consuming your CPU. Is your RAM hitting the ceiling too?
As far as what AVG "found" goes, they want you to think that you have something good. So that later (if they haven't already) they can try to sell you the full suite. Chances are, what AVG found was a false positive. My mother-in-law ran AVG (free) for at least 3 years, after removal, it took 2 complete sweeps with MSE & 2 with MBAM to clean up the garbage that AVG left behind.
I left MSE on her PC, along with the free version of MBAM & SAS, it's been clean since. The ESET Online Scanner verified that.
As far as AVG & Windows 7 goes, had you been on these forums when 7 was released in 2009, you'd have seen the countless posts were AVG was the root cause of BSOD's in Windows 7. Give it a little time, you'll see.
It wouldn't harm at all to run a full scan with MBAM & the free ESET Online Scanner, that can be found here:
ESET :: Get a FREE Online Virus Scan
This scan works best when ran from IE, as it gives you more scanning options. Bookmark & run it at least once a month, if you're going to run a free AV.
It sounds as though you're looking for a free AV. If by chance you don't like MSE, or AVG gives you trouble down the road (it will), Avast is among the best of the free ones. A new version was released this week.
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150 million users can't be all wrong. Plus it's among the top ranked AV's on AV-Comparatives list. It's scanner is the fastest around. They also give you a 20 day trial of their Internet Security. If you hold out, oftentimes they'll offer it at $29.99 for 3 PC's. One function of it that I like is their sandbox browser. Even assuming that the computer it's ran on is malware infested, the SafeZone browser (Chrome) shields you while making a purchase, any keyloggers on the PC won't see what you're doing. And when you close the browser, the history goes with it.
I'm thinking of installing it on 1 of my several installs just for that feature. Or I could install it on both XP modes & the other elsewhere.
The bottom line is, AVG & Windows 7 together won't make for a happy marriage.
Cat