If MCShield is not detecting it then I would recommend that you wipe the USB drive
CAUTION : This fix is only valid for this specific machine, using it on another may break your computer
Open notepad and copy/paste the text in the quotebox below into it:
CreateRestorePoint:
2015-07-30 02:46 - 2015-04-19 02:19 - 00000000 ____D C:\ProgramData\E1864A66-75E3-486a-BD95-D1B7D99A84A7
2015-08-22 05:41 - 2015-08-22 05:41 - 00000000 ____D C:\Users\M BS.Laxmi\AppData\Local\{F70FCFED-DE9F-4F19-BF58-029A8DBA39DA}
2015-08-26 23:12 - 2015-08-26 23:12 - 00000000 ____D C:\Users\M BS.Laxmi\AppData\Local\{01E000B5-9D29-4B0D-BF49-9ACDFE2D61DC}
2009-07-14 05:01 - 2009-07-14 06:44 - 84733824 ___SH () C:\ProgramData\msgrh.exe
2015-04-23 03:13 - 2015-04-23 03:13 - 0004138 _____ () C:\ProgramData\updkbqqg.iqa
Reg: reg delete HKLM\SOFTWARE\Policies\Microsoft\Windows\IPSec\Policy\Local /f
Reg: reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\IPSec\Policy\Local /f
Reg: Reg Delete "HKLM\SOFTWARE\Microsoft\Shared Tools\MSConfig\startupreg" /F
Reg: Reg Add "HKLM\SOFTWARE\Microsoft\Shared Tools\MSConfig\startupreg" /F
RemoveProxy:
EmptyTemp:
CMD: bitsadmin /reset /allusers
Save this as fixlist.txt, in the same location as FRST.exe
https://dl.dropboxusercontent.com/u/73555776/FRSTfix.JPG
Run FRST and press Fix
On completion a log will be generated please post that