I recently had my PC start giving errors everytime I tried opening a MS Office document in Sharepoint (WSS2.0). It would cause IE to crash and gave the following error in the application logs:

Event Type: Information
Event Source: Application Popup
Event ID: 26

Description:
Application popup: IEXPLORE.EXE - Application Error : The instruction at "0x30cb0d78" referenced memory at "0x00000000". The memory could not be "written".

Thanks to visitor Kevin, I'm slightly modifying my solution:

At the following path: C:\Program Files\Microsoft Office\

You will see one of the two possibilities:

1: office10 and office11 folders
2: office 11 and office12 folders

Copy the owssupp.dll file from the lower numbered office folder and paste it to the upper numbered folder e.g. copy the file from office11 and paste it to office12. Office12 will also have this file, just back up that file before the above procedure and save it somewhere on the disk, instead of overwriting it with the office11 file.

Now
1. Go to Start Menu
2. Run
3. Type regsvr32 "C:\Program Files\Microsoft Office\Office12\OWSSUPP.DLL"
4. Click ok to the error message.

This worked for me instantly.