What is the best cheap replacement for a desktop running Windows Vista?

Windows Vista reaches the end of its life on 11 April. John wants to buy a new PC to replace his slow 10-year-old Acer Aspire.I have a 10-year-old Acer Aspire T660 desktop with 640MB of memory and Windows Vista Premium installed. The whole system is getting slower and slower, including the instruction to print documents and/or photos to my HP printer/copier/scanner.I use the PC for email, online banking, word processing and spreadsheets (Microsoft Office), Skype and some games. Broadband here to