Posting a Screenshot ... a tutorial of sorts for otherego. (no charge)
You will need ....
A PC with a keyboard,
A Photobucket account (or similar of your own choosing)
A picture editing prog such as Irfanview, Paint shop pro or even just Paint from the standard windows portfolio.
This is what you have to do.
Get the image that you want to post on your PC screen.
Press and hold down the CTRL key.
Click the "Print Screen" key which is usually next to the F12 key on the top row.
What has just happened now is similar to doing the copy bit of a copy/paste operation. That means that the image currently on your screen has been saved and can now be used in various ways. You can now do whatever you like with your screen because the image that you want is saved.
You now need to use a picture editing prog. Personally, I use Irfanview. It is free and does all that I need with no fuss. Download it, install it and let it work for you here.
Open Irfanview (or your preferred image editing software) and click on "edit" on the top row, followed by "Paste".
The image that you saved will now appear on screen. This is where you can choose an area of the screen that you want to include in your posting. To edit the bit that you want, put your mouse pointer at the top left hand corner of the bit that you want and, holding down the left button on your mouse, drag the mouse down to the bottom right corner of the bit you want to keep. You should notice that a box has appeared around your selected section. Let go of the mouse button and click on "edit" again followed by "Crop selection". Everything except the bit you wanted will now go away and you are left with just the good stuff.
Now you just have to get it to the right size. I have found that for these pages, a size of 600 across the top is a good size to go with for many screens.
To do that, on the irfanview screen, click on "Image" across the top and then "Resize/resample in the drop down box. Then just type in the size that you want your image to be in pixels. If you do one side, the prog sorts out all the rest for you to keep the ratio.
Save the finished image to your desktop or some other place where you won't lose it.
Now open your Photobucket account and upload the image.
To past any such image on these forums, locate the picture in Photobucket and click on the photo. Photobucket seem to be making changes just now so this next bit may not be the same next week but the idea will be the same. You need to click on the text box next to "Direct link" to highlight the text in the box which starts with http://i1008.photobucket.com/albums
Right mouse click and copy that full line of text.
You now need to get the image on to these pages. To do that, type

(note the space). Now put your mouse pointer in front of the > and right click followed by "paste".
Job done.
Don't mind me. I just live here :^O