Fasaso -- You need more heat -- bigger/hotter soldering iron. Those components are soldered on with a “solder wave,” which runs very hot. Good luck, Russ

Peter — White vinegar will clean the terminals. Brush it on liberally, and the corrosion will dissolve. Good luck, Russ

Samuel — Go to https://www.magellangps.com/ Choose: Support I haven’t used it for a while, but, as I recall, you will need to use Google Chrome to be able to download any files. Good luck, Russ Walden

Susan — That message indicates that your Operating System is corrupted and needs repair or replacement. According to the specs, the computer has an optical drive (DVD). Use a Windows system disk to boot the computer. At the boot-up screen, choose “Repair.” In many cases, this will repair the OS and allow the system to boot. If this works, all of your programs and data will be retained. If it does not work, you will need to reinstall Windows, in which case, your programs and data will be lost. There is a way to export your data to USB drive, but programs will be lost. Post any questions and I will try to help. Good luck, Russ Walden

There are different versions of the HP Envy 27, with different storage components, If you add the model number, then do a search on "HP Envy 27 [model number] Specs," you will find detailed specs for the system. Good luck, Russ

Jeff - Log into BIOS on startup — usually F2 or Delete key. An onscreen message will tell you. You can manage Overclock settings there. Good luck. Russ

Charlotte - White vinegar will dissolve the corrosion. It may take more than one application, depending on extent of leakage. The vinegar will not harm internals. Just wipe it clean when done. Good luck, Russ

Margaret — You could use either one, but USB flash drive will be easier since connection is so simple. You don’t even need to open up the computer, as you would to connect a non-USB hard drive. Good luck, Russ

Jonathan — Choose the computer you wish to use as a “file server.” Then, select the drive that will hold the files you wish to access. “Share” that drive. Then, go to each of the other computers and “Map” that drive on each of them. Instructions here: https://www.dummies.com/computers/operat...-systems/windows-7/how-to-map-a-network-folder-in-windows-7/ I am doing this with a six computer network using Windows 10. Works great. Let me know if any questions. Good luck, Russ

Berke -- Ok, the problem just got simpler. One choice would be to clone your old drive to the SSD, but from your comments, I'm guessing you don't want to do that. So, you will need to do a fresh install of Windows 10 on your new SSD. If you have installation media, that's easy. If not, use the Windows Creation Tool at this link: https://support.microsoft.com/en-us/help/15088/windows-create-installation-media to create a bootable USB or DVD for your installation. Your computer should be connected to the internet for the following Install the SSD into your computer, then boot to your install media. If DVD, it should boot naturally there. If USB, you will need to select boot media thru BIOS selection or an F? key. Once booted to the Windows install media, just follow the directions. The system will restart a few times, but do not boot to the install media again. Let it boot to the new Windows install. If it asks to get new updates, let it do that. When your install is complete, it will search for drivers. If...