There are few free OCR softwares available for Windows and there are some Online OCR service available where you can upload your image and it will convert it into text format and allow you to download.
Free-OCR.com is a free online OCR (Optical Character Recognition) tool. You can use this to perform OCR on any image you supply.This service is free.Free-OCR takes either a JPG, GIF, TIFF BMP or PDF (only first page).The restriction is that the images must not be larger than 2MB, there is a limit of 10 image uploads per hour.
It recognizes text and characters from PDF scanned documents (including multipage files), photographs and digital camera captured images. Service allows users to select 28 languages to recognize multilingual documents. OCR results directly to your favorite formats including Adobe PDF, Microsoft Word, Microsoft Excel, Rtf, Html and Txt. Converted documents look exactly like the original - tables, columns, bullets and graphics.