Incompatibility w. MS Word/Thunderbird/DeskPDF/Printing???

I discovered that when I installed CIS 3.9.95478.509 on my Dell XPS M1530 laptop running Vista, I experienced the following problems:

Could not click on links in Mozilla Thunderbird
Could not open any MS Word files by clicking on them–had to drag file to MS Word window
Could not copy text from any programs outside of MS Office and paste into MS Word
Could not print any documents other than from MS Office
Could not use DeskPDF to print

Once I un-installed CIS all problems were resolved.

I am up-to-date on all Windows security patches
I am running Mozilla Thunderbird 2.0.0.22 (20090605)
I am running MS Word 2007 (Home & Student version of Office)
I am running running DocuDesk DeskPDF version 2.5

Please advise. Thanks!