My thumbdrive contains all my important documents from two years ago but today when I tried to open it in my laptop, I couldn’t open my files. Avast sent them (i supposed my files are infected) to virus chest. After viewing similar problems online and tried the suggested solutions be it extracting the files or download Mcshield. I still couldn’t retrieve my files back. For extracting by right clicking, i was told that the file couldn’t be found. McShield scanned and said my thumbdrive is clean. But where have all my files gone to…? Helpppp~ Is there any kind soul out there to help me with this? Urgent urgent. 
attach MCShield all scan log…
malware experts are notified
I don’t get you… what should I do…? Any step-by-step help? 
Hi,
Please download MCShield from one of the following links:
MCShield -Official download link
[*]Double click on MCShield-Setup to install the application.
Next => I Agree => Next => Install … per installation click on Run! button.
[]Wait a few seconds to MCShield finish initial HDD scan…
[]Connect all your USB storage devices to the computer one at a time. Scanning will be done automatically.
[*]When all scanning is done, you need to post a logreport that MCShield has created.
Under Logs tab (in Control Center) for AllScans.txt log section click on Save button. AllScanst.txt report shall be located on your Desktop.
=> Post here AllScanst.txt
Explanation: USB storage devices are all the USB devices that get their own partition letter at connecting to the PC,
e.g. flash drives (thumb/pen drives, USB sticks), external HDDs, MP3/MP4 players, digital cameras,
memory cards (SD cards, Sony Memory Stick, MultiMedia Cards etc.), some mobile phones, some GPS navigation devices etc.
======================================
Please download Anti-VBSVBE and save it to your desktop.
Note: You need to run the version compatibale with your system. If you are not sure which version applies to your system download both of them and try to run them.
Only one of them will run on your system, that will be the right version.
[*]Double click to run the tool and wait until it finishes.
[*]It will make a log named Anti-VBSVBE.txt. Please attach it to your reply.
========================================
Please download Farbar Recovery Scan Tool by Farbar and save it to your desktop.
Note: You need to run the version compatibale with your system. If you are not sure which version applies to your system download both of them and try to run them.
Only one of them will run on your system, that will be the right version.
[*]Double-click to run it. When the tool opens click Yes to disclaimer.
[*]Under Optional Scan ensure “List BCD” and “Driver MD5” are ticked.
[*]Press Scan button.
[*]It will make a log (FRST.txt) in the same directory the tool is run. Please attach it to your reply.
[*]The first time the tool is run, it makes also another log (Addition.txt). Please attach it to your reply.
AllScanst.txt
MCShield AllScans.txt <<<
MCShield ::Anti-Malware Tool:: http://www.mcshield.net/
v 3.0.4.27 / DB: 2014.2.15.1 / Windows 7 <<<
2/20/2014 11:46:44 PM > Drive C: - scan started (OS ~149 GB, NTFS HDD )…
=> The drive is clean.
2/20/2014 11:46:45 PM > Drive D: - scan started (Data ~426 GB, NTFS HDD )…
=> The drive is clean.
2/20/2014 11:46:45 PM > Drive G: - scan started (LINGSY_ ~30026 MB, FAT32 flash drive )…
G:\Thumbs .db - Malware > Deleted. (14.02.20. 23.47 Thumbs .db.73513; MD5: b8a5d1cc47ac43b99d995a7b796df8be)
G:.Trashes\Desktop.ini - Malware > Deleted. (14.02.20. 23.47 Desktop.ini.633064; MD5: e783bdd20a976eaeaae1ff4624487420)
=> Malicious files : 2/2 deleted.
::::: Scan duration: 46sec :::::::::::::::::
MCShield ::Anti-Malware Tool:: http://www.mcshield.net/
v 3.0.4.27 / DB: 2014.2.15.1 / Windows 7 <<<
2/20/2014 11:49:29 PM > Drive G: - scan started (LINGSY_ ~30026 MB, FAT32 flash drive )…
=> The drive is clean.
MCShield ::Anti-Malware Tool:: http://www.mcshield.net/
v 3.0.4.27 / DB: 2014.2.15.1 / Windows 7 <<<
2/20/2014 11:50:42 PM > Drive G: - scan started (LINGSY_ ~30026 MB, FAT32 flash drive )…
=> The drive is clean.
MCShield ::Anti-Malware Tool:: http://www.mcshield.net/
v 3.0.4.27 / DB: 2014.2.15.1 / Windows 7 <<<
2/21/2014 12:08:10 AM > Drive G: - scan started (LINGSY_ ~30026 MB, FAT32 flash drive )…
=> The drive is clean.
MCShield ::Anti-Malware Tool:: http://www.mcshield.net/
v 3.0.4.27 / DB: 2014.2.15.1 / Windows 7 <<<
2/21/2014 12:16:17 AM > Drive G: - scan started (LINGSY_ ~30026 MB, FAT32 flash drive )…
=> The drive is clean.
MCShield ::Anti-Malware Tool:: http://www.mcshield.net/
v 3.0.4.27 / DB: 2014.2.15.1 / Windows 7 <<<
2/21/2014 12:17:18 AM > Drive C: - scan started (OS ~149 GB, NTFS HDD )…
=> The drive is clean.
2/21/2014 12:17:18 AM > Drive D: - scan started (Data ~426 GB, NTFS HDD )…
=> The drive is clean.
2/21/2014 12:17:18 AM > Drive G: - scan started (LINGSY_ ~30026 MB, FAT32 flash drive )…
=> The drive is clean.
MCShield ::Anti-Malware Tool:: http://www.mcshield.net/
v 3.0.4.27 / DB: 2014.2.15.1 / Windows 7 <<<
2/21/2014 12:17:40 AM > Drive G: - scan started (LINGSY_ ~30026 MB, FAT32 flash drive )…
=> The drive is clean.
This was found by MCShield on your drive
https://www.virustotal.com/en/file/852c6adbe81a4d8e7c3488b606995f7f744c3acdf1b3922a8976816b80908793/analysis/
below the txt box you write in, see Attachments and other options 
Please do NOT copy/paste logs, but attach them as requested/instructed.
Here it is… sorry for putting up the codes… How do I delete them away…
Go to MCShield Control Center and tick this option. Then instert your USB again
Yes I can see all my files now! Thank you so much!! ;D ;D ;D Any suggestion for follow-up to prevent such incident from happening again? Are my files still considered infected?
Ohmy, some of the recent files are still missing! Any help?
Any suggestion for follow-up to prevent such incident from happening again?keep using mcshield in the future....
Ohmy, some of the recent files are still missing! Any help? :/TwinHeadedEagle will be online later and continue...... when done he will remove the tools used...
Your PC is clean. You said that they appeared, and now they are missing again. What did you do? Did you used USB on other computer?
No I didn’t. The folders were all present when I checked (I assumed everything were there) but I didn’t open the specific files. However, just now when I tried to open the folder and look for specific documents, I couldn’t find my files. For files saved in both this January and February were all gone, while the ones saved last year only some still exist. . .
Did you re-scan your flash again with MCShield? Did you check within Avast quarantine?
When I insert the thumbdrive , McShield stated malware not detected. What is Avast quarantine? What and how do I about it? Thanks…
Here you can see how to access Avast Virus Chest.
http://blog.avast.com/2013/11/03/how-do-i-access-the-avast-virus-chest/
When you’re in, post me the screenshot so I can see did avast deleted your files?
avast! 2014: Using the Virus Chest http://www.avast.com/en-eu/faq.php?article=AVKB21#artTitle
avast! 2014: 使用病毒隔离区 http://www.avast.com/zh-cn/faq.php?article=AVKB21#artTitle
Here’s the screenshot of the viruschest
Avast quarantined some files, do you recognize something of your files?