How to delete group policy

OK - so it's not a hardware question, but I did not see a sub forum for this type of thing.  

Using at home a 7010 desktop with Windows 7 Pro that I had been using at work.  Company went under and i managed to buy the computer from the new owners after the bankruptcy.

Two Issues:

1.  Group policy security folder was locked down by IT and I cannot get rid of the Control Alt Delete start up or the password restrictions.  Tried a batch program that was supposed to reset policies to default, but it failed saying it could not "contact the network".  Is there a file where the group policy configuration is saved on my computer that i can just delete?  Or is there another way to get rid of this?

2.  System used to boot in 30 seconds at work(SSD) and is now taking close to two minutes.  I knocked 40 seconds off the boot time by "disconnecting" two drives it was searching for.  But it still takes well over a minute to boot as I thin it's looking for the main network server which is of course no longer connected, and then timing out after a certain number of tries.

I am using the old network log in.  If I delete that will it still boot up and ask me to create a login  as if it was the starting for the first time?  And will that new login not be affected by group policy or look for the old network server at boot?