A Dell, last year I bought a Dell and it was a total piece of junk. When I received it the hard drive was faulty, after one and a half months they finally replaced it. Then when I finally got the hard drive and went to install Windows the CDR-RW drive would not read the recovery discs, I had to copy them and then they were readable to the unit. After some fighting Dell finally replaced the recovery disks. The new hard drive had bad sectors on it, and fighting with Dell got me nowhere, the replaced drive was used, and was all scratched up with one of the mounting holes stripped, it had been cross-threaded.
I will never buy anything from Dell again. I work on computers, and I have to say I work on more Dell than anything else, although I wish it wasn't so, because in my opinion, they are not even worth working on.
In the 1980's I had a Tandy Colour Computer, and if you want to call a computer useless, well that one was.
First it had no hard drive, you had to use a cassette recorder to save anything. There was no Windows only DOS, and it had a whopping 2 megabytes of RAM. It did however have a floppy disk, but it was 720 kilobytes only. Games were played by inserting a big plastic ROM in one side and the graphics were terrible, and you hooked it to a colour TV, there was no monitors made for it.
It was similar to the famous Commadore 64, and it was the same time period.
I had a few Tandy computers from Radio Shack, the second was a model 3 all in one computer, but black and white screen only, then a Tandy 1000HX the first that was IBM compatible, all these were before Windows was available, they were DOS machines only. Although Tandy did have an excellent word processor, they were not good for much of anything else.