I have recently purchased the Lenovo T60 which is having the specification windows 7 operating system with 64 bit version and intel core 2 duo T7200 2 GHz with 4 GB Kingston ram and also with the 180 GB hard disk space and the BIOS version is 2.25. I have recently put in Windows 7 Ultimate 32bit. When I unlock My Bluetooth spaces I found that windows explorer has stopped up working and resume. Please help me. So that I will be able to get out of this issue.