+ 0 Votes Driver v_2upbha 6 years ago The video driver could be a possible cause of this. Try updating the image with the latest video drivers. You can check it first on a machine and see if it works. + 0 Votes Dell Issues optiplex 745 kateburu 6 years ago This is a known issue now at dell and all of their "work arounds" seem to be hit or miss, they are still not completely sure of whats causing the series of cascading conflicts. When I called yesterday due to my own issues with the new unit my company purchased they ended up taking the machine back and replacing with a different unit as the bios and reg edits weren't enough. + 0 Votes Optiplex 745 Problems... JonathanPDX 6 years ago Have you updated the BIOS? I think they were at 2.2.0 last time I looked. Are all the monitors the same? Are you using VGA or Digital connectors? Can you see initial boot screen when PCs boot up? Can you select booting into safe mode? Inquiring minds want to know! :-) + 0 Votes Symantec is causing this problem - requires registry edit danparker 6 years ago I'm 95% sure the problem you are having is happening because of the Symantec A/V. Here's what worked for us. This is copy and paste 1: F2 during startup to get to the BIOS. 2: Select Drives: and Disable the cdrom (probably SATA1) 3: Save and Exit. The machine will now startup and work. Now, you need to edit the registry. Instructions for what to do can be found here: http://entkb.symantec.com/security/output/n2006103112061748.html In case that page is unavailable, here's the instructions: To create the UseVolumeInfoList registry value 1. On the Windows taskbar, click Start > Run. 2. In the Open box, type the following text: regedit 3. Click OK. 4. In the Windows Registry Editor, in the left pane, go to the following key: HKEY_LOCAL_MACHINE\SOFTWARE\Intel\LANDesk\VirusProtect6\CurrentVersion\Stora ges\Filesystem\RealTimeScan 5. Right-click the RealTimeScan key, and then click New > DWORD Value. 6. Type UseVolumeInfoList for the value's name, and then press Enter. 7. In the right pane, double click the UseVolumeInfoList value. 8. In the Value data box, type 0 9. Click OK. 10. Restart the computer. Remember to re-enable the CDROM at the next boot. This seems to solve the problem.