Hello, I've just purchased the GPT manager but there is no difference to the problems I had before accessing my 3 TB harddisk (Western Digital WDC WD30EZRX-00MMMB0). I can still only see 746 GB as disk size. Windows 7: I can't install the software at all. At the starting screen of the installer, it says "No hi-capacity hard drive found." In Windows 7s Drive Manager, however, I can see the disk (746 GB) and can convert between MBR and GPT format. Windows XP: here I can install the software, but in XP's Drive Manager it is displayed as "Unreadable" (before the installation of GPT Disk Manager it showed the 746 GB) and only 127,9 GB available size to create a partition. In Regedit under the CurrentControlSet key that was mentioned in another thread, I see "PartMgr snapman gpt_loader" listed under "UpperFilters". I have uploaded the log files you requested to see in another post. My Bios is GeForce6100PM - M2 V:2.0. If the software continues to malfunction, I hope to get a refund... :-/ I really need this disk working and spent all day over it, I just bought your software to finally get this disk working! thanks, r.