Windows 7: Missing Drivers?

Today i went to the device manager and i have seen several yellow warnings things like: Dritek General Port I/O, MpKsl392e8d3c, MpKslcf6bfef0, SASDIFSV and SASKUTIL. Anyone can help me fixing them?

PS: I don't know if this matters but my laptop is an Acer Aspire 5737Z

Welcome to Windows Seven Forums.

It would be helpful if you can post a screenshot of your Device Manager so we can see what's going on.

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here it is dude.

oh i forgot to mention, all this things have this error when i open them:
Code 24
This device is not present, not working correctly or all the drivers are not installed. (Code 24)
The device seems to be missing. The hardware may be bad or a new driver might be needed.

Do you use these drivers for anything? Have you encountered any problems?

Have you tried updating the drivers?
Right-click on the driver, then select "Update Driver".

That is the problem, there isn't any update driver option.

They look like they could possibly be viruses, run a virus check to make sure.

What is your AV? I would advise using the Microsoft Safety Scanner to scan your PC, it finds viruses even my AVG 9 won't.

Just click the download option at the top of the page.
Microsoft Safety Scanner - Remove Spyware, Malware, Viruses Free

A virus? i don't think so but i will try it anyway.
Those errors have been there for a long time, i did lots of scans with Malwarebytes and Microsoft Security Essentials and nothing found.

Ah okay the way you worded in the first post made me think it was a very recent thing.

I take it it's not affecting you then? Just curiosity?

well i'm not sure if this is affecting me but if there is a yellow warning icon it must be something bad.
Wait the Dritek General Port I/O have been there for a long time but the other 4 are recent(i think), i remember when i accidently uninstalled my Atheros AR5B91 Wireless Network Adapter from the device manager i had no wireless internet so did i do? I went to the manufacturer website from where the computer is from, i downloaded updated them and after i think those 4errors appeared(but i'm not sure).