DavidR
4
The tfsndres.sys file could still be an issue as a VT scan can’t really replicate what the aswMBR scan is doing. But there are references to this file being associated with a backdoor trojan.
It is also associated with Drive Letter Access by Sonic DLA (Sonic Solutions), IBM DLA or VERITAS Software, Inc. Do any of those ring any bells of installed software ?
The sprz.sys, is a different ball game and most relate to malware, so will need further investigation from essexboy or other malware removal specialist.