Install it, update it, boot into safe mode with networking and do a full scan, remember that MSE is a basic (but good) antivirus, so an aditional scan with MBAM won't hurt, it actually may end up finding some more viruses.
System Manufacturer/Model Number Built by Myself OS Windows 7 Ultimate SP1 (64-bit) CPU Intel Core i5-2310 @ 2.90GHz Motherboard MSI PH67A-C43 (B3) Memory Kingston KVR 16GB (4 x 4GB) DDR3 @ 1333MHz Graphics Card PNY XLR8 GTX 560 Ti 1GB GDDR5 Sound Card Realtek HD Audio (ALC 892) Monitor(s) Displays LG W2353V-PF Screen Resolution 1920 x 1080 (HDMI)
Keyboard Logitech MK320 Wireless Keyboard Mouse Logitech MK320 Wireless Mouse PSU Thermaltake Toughpower XT 575w Modular 80 PLUS Bronze Case Cooler Master CM Storm Enforcer Cooling Thermaltake Frío, CM MegaFlow 200mm (2), CM 120mm (1) Hard Drives Samsung HD502HJ (500GB), ExcelStor J8080S (80GB) Internet Speed dl: 1024kbps, ul: 512kbps
Computer type PC/Desktop System Manufacturer/Model Number Golden Mk. I.3 OS Windows 7 Ultimate SP1 (x64) CPU Intel i7 860 @ 2.80 GHz Motherboard Gigabyte P55A-UD3R Rev.1. Award BIOS F13 Memory 16GB Corsair Vengance DDR3 @ 661 MHz Dual Channel (9-9-9-24) Graphics Card EVGA NVidia GTX 560 1024MB Sound Card Realtek Integrated Monitor(s) Displays Dual Samsung SyncMaster 2494HS Screen Resolution 1920*1080 and 1920*1080
Keyboard Logitech G110 Mouse Logitech MX518 PSU Thermaltake ToughPower QFan 750W Case Thermaltake Element S VK60001W2Z Cooling Corsair H60 Water Cooling, 2*230mm and 2*80mm case fans Hard Drives 1*OCZ Vertex 2 60GB SSD;
2*Samsung F3 SpinPoint 1TB in RAID0;
3*Samsung F1 SpinPoint 1TB in RAID5;
1*Western Digital 500GB External USB 3.0
1*Seagate 500GB External USB 2.0 Internet Speed Not fast enough!!! Antivirus MSE and Malwarebytes Pro Browser Chrome Version 25 Other Info Laptop: ASUS X54C, Intel Core i3-2330M @ 2.0Ghz, 4GB RAM, Intel HD on-board graphics, Windows 7 Professional SP1 (x64), LinuxMint 14 (x64), PepperMint 3 (x86)