On this page it states under specifications that XPe is supported; http://ibx.intel.com/directory/productpage/tabid/85/language/en-us/p-2085-eset-nod32-antivirus.aspx We have version 4.0.474 installed on several XPe (2009 standard) and it works fine as long as the FBWF is disabled. When we enable the FBWF, the pattern file updates fail to download and apply. I realize that Nod's going to have to download the pattern updates upon each boot with FBWF on. But it should update, right? The error is "General Compiler Error." as well as unable to create temporary files. It's XP SP3, fully patched as of 3 weeks ago, %TEMP% and %TMP% are on Z:\ which is a RAMDrive, 64MB. There is about 450 MB free on the pseudo C:\ drive. (XPe fakes the writes to c:\) Anyway, what do I need to do to get the pattern files updating? Again, works with FBWF disabled - but I can't leave it that way.