xp slowdown after March 2012 windows update

We have several users running small windows xp networks (all peer to peer networks with xp non-dedicated servers), that have experienced major slowdowns on the client/workstations after running the last windows update. if they do a windows restore, the speed comes back.

XP seems to be the only os affected, and in looking for similarites, AVG appears to be installed in each case. Pervasive Workgroup version 10 is the database being used via our General Store POS software, and any function where printing is involved seems to suffer the slowdown.

I tested a 2 station xp peer to peer here and cannot duplicate the slowdown. I am running security essentials for AV in my test environment.

Any ideas? Any help would be greatly appreciated and I thank you in advance for your time.
crich65Asked:
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R. Andrew KoffronCommented:
haha, seems like you already answered your own question, go remove AVG off a fair sample and put MSE on them, and re-apply the update to see if it works. AVG is nearly as bad as Norton for not adapting well and and needing to be removed and re-installed occasionally. although I admit I'm not a big fan of either.  I'd go without AV software before I used either of them.
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crich65Author Commented:
Sounds like a plan. We never really had issues with AVG as it seemed leaner than Norton, McAfee, etc

But, now that I think about, I did have one guy who ran slow after the march update, then turned off AVG,  and the speed picked back up.

Again, I will give it a shot, and thanks for the assistance.
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