Try this:
1 click on Start
2 click on Run
3 type CHKDSK in searchbar and click OK
4 let this program run UNTIL it is finished.it may seem like it's hung up during step 2 but the program is still running.
Or:
Try to boot in safe mode with networking and go to the web site I mentioned and get the free version of Malwarebytes' Anti-Malware
Too late...you're infected with a smitfraud.You'll need to go to http://www.bleepingcomputer.com and go to the Uninstall List,find that program and follow the uninstall direction. Don't try to restore your PC to a time before this happened,it will only make it worse.
I wrote this to another poster but it all still applies to you.
She has what is known as a smitfraud(a rogue security program).She'll need to go to CNET at http://www.download.com and install the free version of Malwarebytes'Anti-Malware and then update the signatures.After that ,go to http://www.bleepingcomputer.com and look in the Uninstall List for this program (she'll need to know exactly what the name of the program is;obviously she doesn't or is not paying attention)and get the instruction for removal. sometimes they might ask you to install ComboFix or SmitFraudFix but Malwarebytes' should do it. DO NOT restore the PC to an earlier time;that only makes it worse.
I'm not sure how she's attempting to get into safe mode,but the PC must be completely off.Then you hold down (don't tap)key F8 (not F and 8 but F8) and restart the PC and work your way into safe mode from there.
After the PC is in safe mode,open Malwarebytes' and do a complete scan.If it finds anything,move these to quarantine and then delete them.If you don't move them into quarantine and you just delete them,they will reinstall themselves.
If she has CCleaner,run that to clean out any junk left behind.Then restart the PC normally.
When you surf the net unprotected,this is what you get:viruses,trojans,malware,spyware,smit… a bunch of other crap.To protect your PC you'll need several pieces of security software programs.The ones listed below are free and many out perform some paid security suites:
1 a firewall (install only one)
2 an anti-virus (install only one)
3 an anti-spyware/malware (install two or three)
4 a secure browser
5 a disk cleaner (deletes temporary files,cookies,etcGet one or two)
Free firewalls:
Comodo Internet Security (just the firewall and not the anti-virus,unless you want the full program)
ZoneAlarm
PC Tools Firewall Plus
Outpost
Online Armor
Free anti-virus:
avast! Home Edition 4.8
Avira AntiVir Personal 9
AVG 9 (use Threatfire with this program to increase your level od detection)
Panda Cloud Anti-Virus
Microsoft Security Essentials
Free anti-spyware/malware:
Ad-Aware
Malwarebytes Anti-Malware
Windows Defender
SUPERAnti-Spyware
Spybot Search and Destroy
Spyware Terminator
SpywareBlaster
Browser:
Firefox and load it up with McAfee Site Advisor,AVG Link Scanner,or W.O.T.(Web of Trust).Also get BetteryPrivacy,Ghostery, TACO (Targeted Advertising Cookie Opt-Out),KeyScrammbler.Set Firefox to delete cookies when you close the browser (Tools,Options,Privacy,Cookies).NoScript is also available for Firefox. If you get AVG as your anti-virus,there is no need to get the AVG Link Scanner because it is included in the program.
These are free for personal use and you can download them at CNET http://www.download.com
Some add-ons for the Firefox browser are available at http://addons.mozilla.org/en-US/firefox/
Disk cleaner and defrag utilities:
CCleaner ,Glary Utilities,and Advanced SystemCare ; all free
Get it at CNET http://www.download.com
Also get Smart Defrag and run that in Deep Optimize mode
clean and defrag for a fast unclogged OS