I am working on a Dell Vostro 3550 Service Tag # 7VRDLR1. I had to format the drive and no longer have the Dell recovery partition with drivers, bloatware and what not. I loaded a clean copy of Win7 Pro 64 and have everything working as far as I know but the machine will not come out of "Sleep" mode either after closing the lid or selecting "Sleep" from the Start menu. The Dell Driver Discovery Tool will not work on this machine, and endless loop that says disable old version and install new one. Not sure which driver I am missing or have installed incorrectly, but I am guessing that is the problem. Windows Update is not picking anything up on the hardware end of things. If you have any ideas of what I might need to do, I would appreciate the assistance. Thanks!