Technically speaking ... yes you can ... however, it is extremely difficult to do. The first thing you'd want to do is make sure you have a compatible GPU ahead of time. You sure wouldn't want to go to all this work and then find out you can't get a GPU for your model of iMac! If this doesn't scare you off....you can follow the step by step tutorial at this link ... iMac Intel 21.5" EMC 2389 GPU Card Replacement
It sounds like Outlook is set as the default email program on your computer. If you click an email link on a website, Windows will launch the default email program..in your case Outlook, and try to send an email to that link. If you have not configured Outlook with server settings, it can't send your email. Since you use a web based email service(Hotmail)...you must right-click on the email link and select 'Copy', or "Copy email address"..then go to your Hotmail account, compose a new email and then paste the copied address into the "To" field.
*Make sure the Print Spooler service is running ... 1.GO to Start then run and type services. msc and then click OK. 2.Scroll down and find Printer Spooler service under the Name column 3 Right click on Printer Spooler and select Properties. From dropdown menu choose automatic for Startup type. Check Service status, if service is stopped click on Start and than OK button, but if service is started first stop it with Stop button than click on Start and OK. *Also..check for dependencies... while in the Print Spooler service properties.. 1.Click the Dependencies tab. The first box lists all of the system services that must be running for Print Spooler to start. These are the dependencies. 2.Make a note of each service, click OK 3. Now go through the list and start each service upon which Print Spooler is dependent( if the service is not already started). If a service was not started, right-click it, click Properties and then confirm that the Startup type is Automatic.
You installed a new hard drive...make sure it is still detected by the BIOS. Make sure the hard drive is listed first in the BIOS boot order. Try unplugging all USB devices before booting. Reinstall GRUB using a LiveCD. Instructions are too lengthy to write here...go to this page and read the section titled .. "Fixing a Broken System - Reinstall from the LiveCD ". https://help.ubuntu.com/community/Grub2/... Update: This solution works for some people ... 1. LiveCD boots into a blank screen. When you see the boot menu when you boot LiveCD, hit F6 and select the “nomodeset” option. 2. Boots into a blank screen after install. Reboot and keep your finger on the “SHIFT” key till you get the grub menu. Highlight the first entry and replace “quiet splash” with “nomodeset” . Hit CTRL + X to continue booting. Once logged in install the latest Graphics drivers. System -> Administration -> Additional Drivers When you say the same thing happens even when booting from LiveCD....try changing the boot order in BIOS to cd/dv...