What is the main benefit of permitting solely signed code to be installed on computers?

By exclusively using digitally signed code, the creator of the software can be verified. For instance, if a printer or multifunction device (MFD) driver is digitally signed, it provides assurance that it is genuinely a printer driver from the vendor it claims to be from and not malicious software disguised as a printer driver. Signed software instills a high level of confidence that it is not malware, but it does not offer an absolute guarantee. For instance, the infamous Flame virus was signed with a compromised Microsoft digital certificate. The digital signing of software has no impact on patch management. Lastly, digitally signed software does not execute any faster or slower than unsigned software.