Yes I agree, I has same network problems. I was about to reinstall Windows XP on my computer, thinking of a corruption problem or else. Luckily I found your post. I removed KB885250. And now I see my network files back ! My config : 2 PCs with Windows XP SP2 and all updates. Linked by a netgear WGT624 router. Making mapped network drives with the admin shares shares between the 2 PC. Same login and password on both. Full rights to acces all files and folders. When this KB885250.exe was installed, I encountered some "bizarre" problems. Folders were missing, coouldn't see them, but when typing it in the address bar, I could access it. In a folder I could see all .doc files, but not .xls files. It was really weard :s I was getting this pb on both pc accessing shares of the other one. Hope Microsoft will dare correct this issue