IE 6 not responding

[foznikjj]

This is a older computer not the one listed below:
I'm using Windows 98se, with IE 6 and OE 6, Zone Alarm firewall and AVG antivirus. My problem is when I have OE 6 open, click on a link in an email, which opens IE 6, after closing the IE 6 link and then closing OE 6, then try to open IE 6, I get an airglass with my cursor. When I open task manager it says explorer not responding. When I click on end task in task mgr, Explorer will not close. I try ctrl,alt,delete and sometimes it will reboot computer, and at times I have to hold the on button to manually shut down. A few days ago I was trying to get it to reboot and computer booted to a message that MSVCRT.DLL in C:\windows\system folder was not found "reinstall windows". I copied the dll from another computer and that fixed that, but I'm thinking if computer keeps hanging it will lose this file again or worse.Everything else works good on this computer. I run AdAware and Spybot Search&destroy regulary. I think there is a conflict between OE 6 and IE 6 being open at the same time, but have not been able to find remedy on Google.
Thanks for any help, Foz