Can Group Policy Become Corrupted?

I have some group policies that have probably been around since the 2003 server days, and a few new ones. It seems when i disable group policy my logons to the pc are quick and when i turn them on they can be very slow. I also see very old shortcuts, and ie favs that i removed years are keep re-applying.
If i delete all of my group policies and start from scratch should i or can i go into the sys vol folder and delete anything in there before i start recreating new policies. I don't know how it is still applying all this old stuff, there must be a copy of that old policy in sysol or something?
Thanks!
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valmaticAsked:
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PotterJonCommented:
Try to create a fresh OU called test, make sure it isn't inheriting any policies and place a test pc in there.  Apply your individual policies one at a time and log on to test which is causing the slow down.  From experience redundant drivemappings and folder redirection are sometimes to blame.
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valmaticAuthor Commented:
I have something similar to this, our it group basically has its own policy i made a year or so ago and does not inherit anything, however it always seems like it gets some old settings that were from the default domain policy we use.
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PotterJonCommented:
Any old logon scripts being applied to the user containing 'reg fixes' or similar?
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valmaticAuthor Commented:
We do have some logon scripts but i dont think they have reg entries anymore, but they used to do a lot back in the day.

You think it is safe to remove all my policies and clear out the sys vol folder manually for any stragglers after i do this or is there any files in sys vol i cant touch?
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PotterJonCommented:
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valmaticAuthor Commented:
well i found that my main dc is not replicating new gp changes to the second dc i have. Time for a new question thanks for the help.
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