Over the last few days, I reinstalled Win2kSP2 to a spare harddrive I had just swapped into my Fujitsu LifeBook P1120 (long story <wink>). Subsequently, I DL'ed the newest Python alpha (2.4a2), and when trying to install it, I immediately got this error: This installation package cannot be installed by the Windows Installer service. You must install a Windows service pack that contains a newer version of the Windows Installer service. (Python 2.4a2 had been working on the LifeBook P1120 before the crash and subsequent reinstall.) I immediately tried installing Python 2.4a2 on my older, HP laptop, and that went fine. I then went back to the Python alpha page and DL'ed the ~1.8MB file linked from MS's site. After running the new DL from MS, the Python MSI installer seemed to run. However, now Idle wouldn't run, although the Python command line (console) worked. I tried running Idle using Windows Explorer from inside my Python installation at: E:\Python24\Lib\idlelib\idle.pyw (and idle.py) but those didn't work, either. (E:\ is my Win2k partition and it's a FAT32 partition.) I then checked the new 2.4a2 install on the older HP laptop, and there Idle worked -- from the menu shortcuts, and from launching the idle.pyw file in Windows Explorer. (I note that the HP laptop already had Python23 on it. The HP has *almost* the same OS: Win2kSP3 -- not a fresh install -- and is using NTFS for its Win2k partition.) I also note that the *.pyc files were not created by the installer on the Fujitsu LifeBook P1120 but were on the HP Omnibook 900B (as may be surmised). Back on the P1120, I used the MSI installer to "repair" the broken install twice, used it again to completely remove Python, rebooted <wink>, and then use the MSI installer one more time to reinstall. Still no go. Am I overlooking something simple...? Thanks for any help anyone can offer. (I'll try to followup as this gets solved -- I've reinstalled onto an old harddrive, so I may crash again... :-) ) I'll-keep-at-it-and-try-DL'ing-2.3.4-tonight'ly y'rs Richard -- email works if unmunged: sick<PERI0D>ole<P0INT>fart<PIE_DEC0_SYNTAX>newsguy<MARK>com