Solved: Error: sfc database, troubleshooter, sdiageng.dll

Hello all,
I am having issues on an HP windows 7 home desktop. it had been infected by a virus, but this error came before it. Anytime I try to run Microsoft's fixit or any troubleshooter, it comes up with the error of that Sdiageng.dll is either missing or corrupted. so, I tried to run sfc from command prompt. well, if finds stuff alright, but alas, it can't fix it! so I look at the log, and it says that it's database is also corrupted. well, I have no idea what to do. I found sdiageng.dll in the windows directory/system files. it's there. I even replaced it. still, same error. this all started with me trying to fix windows update error 1 and 643. I have run numerous scans of malwarebyte's and trend micro and super-anti-spyware. they found some stuff, I got rid of it. but still the error remains. I have searched around for a way to be able to fix sfc's database, I tried one, but the commands were for vista. I was hoping it'd work, since vista and 7 are really similar, but it didn't. so I am hoping someone on these forums can give me some help. I know a fair amount of knowledge of computers, and whatever I don't know, I can usually find on google. and I know some information about malware and viruses and the whatnot that's bad stuff. I've had to remove malware twice from computers and I didn't kill them in the process.
but, anyways, please help!
Thanks in advance,
- shadow6224

 

Forgot this, sorry.
Tech Support Guy System Info Utility version 1.0.0.1
OS Version: Microsoft Windows 7 Home Premium , Service Pack 1, 64 bit
Processor: AMD Athlon(tm) II X4 635 Processor, AMD64 Family 16 Model 5 Stepping 3
Processor Count: 4
RAM: 5879 Mb
Graphics Card: ATI Radeon HD 4200, 256 Mb
Hard Drives: C: Total - 941818 MB, Free - 882265 MB; D: Total - 11752 MB, Free - 1433 MB;
Motherboard: FOXCONN, 2A92 , 1.01,
Antivirus: Trend Micro Titanium Maximum Security, Updated: Yes, On-Demand Scanner: Enabled

 

Just did a re-install.