Hi, Dont know whether I can get this PC working but I thought I would give it a try. My old firm went bust and the new give away the old PCs. The PC I have is a Lenovo Thinkcentre M93p (mini) 4g memory. Originally it had windows 7 loaded from new but because of security reasons they wiped the HDD and ive no back ups, to get it going Iam using a new operating system disk windows 7( i own my own disk) I have been into the bios and set the HDD to boot from cd/dvd and put the operating disk in but it just keeps coming up with the same error saying it cant find the operating system. There is an error number which I can get if anyone needs it. When the PC boots the cd/dvd is spinning but wont load. I ve also tried a windows 10 disk and it didnt work either. As this keep failing I wonder if i have to get onto Lenovo and see it they will have to sell me an original back up operating system to get it going. The one thing I must tell you this PC comes with no cd/dvd fitted , i have had to use a plug in USB one, the disk is spinning when the PC starts as I have chosen it to be 1st device boot. Is there anything else I could try to get a operating system loaded onto the clean HDD. Thanks.