I did a registry fix for World of Warcraft (which works fine on my boyfriends computer) but did not work at all on my computer. I added TcpAckFrequency into HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\ as a new DWORD, and changed the value to 1. Then I added TCPNoDelay into HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSMQ\Parameters as a new DWORD with a value of 1. I double-checked and then re-double-checked that I did it correctly. When I rebooted my computer, first I couldn't connect to the internet (a wireless connection) and then things got worse as I restarted; it started freezing on the desktop or freezing before it even got that far. Then I got the DRIVER_IRQL_NOT_LESS_OR_EQUAL blue screen. I jumped into safemode and deleted the two new registry values but that did not fix the problem. I then searched for the problem through Microsoft Help and came up a with a hotfix which worked temporarily (after using it in safemode), which got me to my desktop screen booting regularly. All was fine and dandy until my computer attempted to connect to a wireless connection. Here is the link to the hotfix that I used: http://support.microsoft.com/kb/829120/en-us
At this point, I'm at a loss. I've since system-restored two times to no avail. I've tried safe mode with networking but it froze when entering that so I'm assuming it has to do with the internet.
I want to avoid reformatting at all costs and I'm not sure what to do next.
Please help me, I would greatly appreciate it.