I removed the Symantec antivirus and downloaded McAfee. I did this both on a Vista & XP on the same day. Now the Vista pc boots & freezes after logging in. I don't know if there's a conflict with McAfee & Vista, but I can't even Ctl-Alt-Del to stop freezing programs from running and have to hard shut down & restart in safe mode to even get it working. I'm not super tech savvy & could use some help. Thanks!

While in Safe Mode with Networking....
Run Norton Removal Tool: http://service1.symantec.com/Support/tsgen...005033108162039
Uninstall McAfee through Add\Remove.
Run McAfee Consumer Product Removal Tool: http://majorgeeks.com/McAfee_Consumer_Prod...Tool_d5420.html

Next...forget about those two horrible programs.

- Avast! free antivirus: http://www.avast.com/eng/download-avast-home.html
- Avira free antivirus: http://www.free-av.com/en/download/index.html

- free PC Tools Antivirus: http://www.pctools.com/free-antivirus/
- free PC Tools Firewall Plus: http://www.pctools.com/firewall/

- free Comodo Internet Security (firewall + AV): http://www.personalfirewall.comodo.com/
NOTE. During installation, Comodo will also allow you to install AV only, or firewall only, if you prefer to combine one Comodo product with some other product.

If you decide to install Avast, or Avira, make sure, Windows firewall is turned on, or use PC Tools Firewall Plus, or Comodo firewall..
If you decide to install Comodo Internet Security, or just Comodo firewall, make sure, Windows firewall is turned off.

IMPORTANT! Make sure, you use only ONE antivirus, and ONE firewall.