I did try installing the software by right-clicking and selecting run as administrator and I still get those two errors. I tried disconnecting from the Internet and disabling the firewall (but did not disable the A/V doggone it!) and still got errors. If I opt to continue even though those two files did not self-register (or unregister whichever the case may be) then the program is completely unstable. I'll give it a go without the A/V running and report back what happens. ________________________________________ According to their online materials, it doesn't appear that they aupport Vista at all. http://personal.jccmi.edu/tuckeyalanaj/133/Online/Excel_tutorials/phstat_tut orial.htm#part1 Requirements for using PHStat2: Windows 98/98SE/ME/NT 4.0/2000/XP Home/XP Pro computer system. But in another area, they give specific instructions for setting it up on a Vista system. That's below, but it makes me wonder how recently they added Vista support (and therefore, how complete it is) http://www.prenhall.com/phstat/phstat2_Vista.htm Special instructions for running the PHStat2 setup program You must use an administrator account to run the PHStat2 setup program (setup.exe) to install PHStat2 if you are using the Windows Vista operating system. If the User Access Control (UAC) feature is activated, you must choose to allow certain system operations to complete the setup successfully. In order to run an .EXE as an Administrator under Vista, right click on the .EXE file and select "Run As Administrator" from the menu. I'll also suggest that you first scan the .EXE file with your AV and then turn off the AV just prior to running the .EXE file. Your AV may be getting in the way of allowing all of the stuff in this install to integrate with the OS. Peace, Gman http://www.thevenusproject.com/index.php "The entire future of humankind is yet to be written" --------------------------------------------------------------- Please remember to trim your replies (including this sentence and everything below it) and adjust the subject line as necessary. To subscribe, unsubscribe or modify your email settings: //www.freelists.org/webpage/pctechtalk OR To subscribe to the mailing list, send an email to pctechtalk-request@xxxxxxxxxxxxx with "subscribe" in the Subject. To unsubscribe send email to pctechtalk-request@xxxxxxxxxxxxx with "unsubscribe" in the Subject. To access our Archives: http://groups.yahoo.com/group/PCTechTalk/messages/ //www.freelists.org/archives/pctechtalk/ To contact only the PCTT Mod Squad, write to: pctechtalk-moderators@xxxxxxxxxxxxx To join our separate PCTableTalk off-topic group, send a blank email to: pctabletalk+subscribe@xxxxxxxxxxxxxxxx ---------------------------------------------------------------