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Clean Master, one of the top junk cleaning and system-optimizing apps for Android has released a PC version with all the cleaning abilities. It lets you speed up your PC by cleaning system cache, browser cache, junk related to media files, software, outdated registry entries and other obsolete files at easy. It is fast and simple to use.

Various methods are available for protecting a computer from unauthorized access under a working environment. USB Raptor is a new tool and as it name implies it uses a USB flash drive to lock and unlock a computer. Your computer is locked once a specific USB drive is removed and unlocks it when the drive is plugged in again to any USB port.

Windows automatically assign letters to your drives. Sometimes you might want to change drive letter to your drives or external devices and although you can change these via Windows Disk management tool, the process is not as easy as it could be, especially for novice users.

Want to prevent your kids from accessing certain programs installed on your Windows computer? Simple Run Blocker lets you do that quite easily. With this app, you can block any apps just by dragging and dropping the exe file or you can block all apps except a list of apps using the Kiosk mode.

PCtransfer is a new tool from IObit that lets you backup and restore your important documents, browser bookmarks and settings, email messages and contacts, Skype chat records, third-party programs and settings, photos, videos or any file you wish just with a click. This portable tool is perfect for transferring files from a PC to a new installation.

Upgrading your computer’s memory is one of the most useful upgrades you can perform, but you should know the installed memory type (DDR2, DDR3, etc.), its bus clock speed, etc. before upgrading. To know memory details of your system you can use applications like RamMon and RAMExpert.

Many software installations, especially freeware, comes bundled with redundant programs or unwanted programs (PUPs) such as browser toolbars, scareware system cleaners, browser homepage hijacker, some types of adware, etc. They are being installed on computer while installing the main program. Advanced users can easily avoid PUPs, but if you’re an average PC user, you possibly leave everything by default, thus installing lots of additional unwanted programs without even knowing it.

Disk partition Wiper is a freeware tool that lets you wipe everything from the hard disk drive of your PC. This tool is especially useful if you decided to discard your hard drive or resell your PC so you can prevent your personal information or company documents from recovering.

Setting up a wireless modem or router in your home or office is something anyone can do, but securing it with an encryption protocol is very important, because, otherwise people within the wireless router’s range will be able to connect to your Wi-Fi network, which may lead to slower your connection as well as access to the shared files and folders on your network.

If you want to set an image you have taken as desktop background wallpaper, your Windows 7 or Windows 8 PC provides five preset options such as center, fill, fit, stretch and tile to fit it to the screen. But these five options isn’t enough if you want to make the wallpaper more precisely “aligned” on the screen or want to zoom in a portion of the image on the screen.

Would you like to know what time your computer was turned on? Here is how you can view dates as well as times that your computer was turned on. It may be useful, for example, to know if your computer has been turned on without your knowledge.

Old device drivers can cause hardware failures, conflicts, and system crashes on your Windows 8, Windows 7, Vista and XP computer. So old drivers must be updated to the latest version, but it is not an easy process. To help you iObit has released a free tool called Driver Booster that helps you detect and update old drivers on your PC.

When you buy a new PC, whether it is a desktop PC, laptop or netbook, it comes pre-installed with several software programs, utilities and other trial wares. Unfortunately, most of them are useless and instead of the benefit, it make your PC slower, consumes disk space and reduce your overall productivity.

There are several applications available for Windows PC to speed up its performance and improve overall system stability by cleaning junk and redundant files as well as unwanted registry entries from system. Most of them are designed to use for all users. Here is another simple tool called OSHI Cleaner to speed up system performance and stability.

Mounting ISO images in your computer is a great way for you to view and run the content of the disk image without having to burn it into a CD/DVD. While Windows 8 is comes with native support to mount ISO and VHD images in the system, earlier versions such as Windows 7, Vista and Windows XP does not come with this feature. Now, Microsoft has come up with a little utility called “Virtual CD-ROM Control Panel” to bring ISO mounting feature in Windows 7, Vista and XP.

If your Internet connection is particularly zippy, you might want to share it with your family members or friends by creating your own hotspot. You can do that very simply with a free application called Connectify Hotspot. All you need is a PC or laptop running Windows 8 or Windows 7, with built-in Wi-Fi card or adapter, and the free version of Connectify Hotspot.

These days, it isn’t uncommon that you connect multiple internet connections simultaneously to your computer. For example, LAN, Wi-Fi and Mobile internet (GPRS, 3G, etc.) together on a PC. However, as you all knows, switching between Internet connections isn’t a simple task. To switch an Internet Connection from one to other, usually you need to find your Network Settings, then find the connection and then connect.

In certain situations, you may want to stop others copying your important files (projects, programming codes, personal pics, etc.) from your computer. Here is how you can simply disable all copying option of your PC with URC Access Modes. This free tool lets you stop people easily copying files off your PC.

With Windows 8, you can install several apps and games from Windows Store. If you are serious about some of your games, you might not like to lose your game progress, levels and settings when you re-installing the game or re-installing Windows 8. As these Windows 8 games and apps differ from traditional desktop programs, it isn't an easy task to back up such data.

There are a number of free tools that disables USB port of your PC, so you can prevent anybody copying data from your computer. In addition, as most USB malware uses a file called autorun.inf, which runs automatically when the USB drive is plugged into your PC, you can prevent such malware infection some extend by disabling USB port of your PC.