Here is the system info provided by photoshop: Adobe Photoshop Version: 9.0 (9.0x196) Operating System: Windows XP Version: 5.1 Service Pack 2 System architecture: Intel CPU Family:15, Model:2, Stepping:7 with MMX, SSE Integer, SSE FP, SSE2, HyperThreading Physical processor count: 1 Processor speed: 2394 MHz Built-in memory: 1023 MB Free memory: 472 MB Memory available to Photoshop: 908 MB Memory used by Photoshop: 55 % Image cache levels: 6 Application folder: C:Program FilesAdobeAdobe Photoshop CS2 Temporary file path: C:DOCUME~1TOBINL~1LOCALS~1Temp Photoshop scratch has async I/O enabled Scratch volume(s): Startup, 74.5G, 22.0G free Reading on the Intel website it says that pretty much everything on the motherboard has to support HT. So, my processor might be capable, but I don't have the additional hardware support to utilize i.