I searched this forum and also google searched for "backup.exe has encountered a problem and needs to close" but could not find any reference to this error in conjunction with Paragon. I've used Paragon Backup and Recovery 2012 free with success on my Asus dual boot Win 7 and 8 64bit laptop to a WD 3TB external USB 3.0 hd. I installed the same program on my old Dell 6400 to try to backup the entire drive (all four original partitions including Dell's MediaDirect partition) to a WD 2TB external USB 2.0 hd. It gets about a minute into the process and then returns the error alert: "backup.exe has encountered a problem and needs to close. We are sorry for the inconvenience." There is another box with this information: AppName: backup.exe AppVer: 10.1.19.16240 ModName: hdm.dll ModVer: 10.1.19.16240 Offset: 001e0390 and further extensive details were apparently written to a txt file C:\DOCUME~1\....\LOCALS~1\Temp\e4d5_appcompat.txt but that file was not saved, I guess it really was 'temporary', as it wasn't in the Temp folder and a search doesn't find this file anywhere on my Dell laptop. I suspect the Dell's low RAM (2GB ,max possible with its processor) combined with the size of the image could be the culprit, if it needs a lot of ram to write temporary data, although I have performed a similar backup with Macrium's software. The Dell's hard disk total size is 143GB with 19.5GB free space. The backup destination external USB drive size is 1.81TB with 448GB free space. The size of the backup according to Paragon software is approx 100GB. In attempting the process, Paragon creates 3 ARC folders in the target backup folder on the external drive before it returns the error. I've attempted this twice. Thanks in advance for any input.