Chapter 14 Computer Safety Computer security aaj ke digital time me bhot important ho chuka hai. Jab hum internet use karte hain, USB plug karte hain, files download karte hain, ya email open karte hain — tab har jagah kuch na kuch risk hota hai. Isi liye basic computer safety rules samajhna har student, beginner, office user ke liye zaroori hai. Is chapter me hum seekhenge: Virus kya hota hai Antivirus kya karta hai aur kaise use hota hai Strong password kaise banate hain Data backup kyun important hota hai aur kaise karte hain Chaliye start karte hain step-by-step. 14.1 Virus Kya Hota Hai? Virus ek harmful software ya program hota hai jo computer me ghuskar damage karta hai. Ye bilkul real life virus ki tarah computer ke system ko corrupt karta hai. Computer Virus Meaning (Simple Words) Computer Virus = Aisa program jo: Files ko kharab kare Computer slow kare Data delete kare System hang kare Personal information chura le Virus Computer me kaise aata h...

Chapter 13 Troubleshooting Basics Computer chalate waqt bahut si choti-moti problems aati rehti hain — jaise computer slow ho jana, keyboard ya mouse kaam na karna, internet slow ho jana, ya software open na hona. Is chapter me hum in sab common problems ke step-by-step solutions seekhenge, taaki aap bina kisi expert ki help liye, basic troubleshooting khud kar sako. 13.1 Slow Computer Troubleshooting Computer slow hona sabse common problem hai. Iske peeche background apps, low storage, outdated software, virus, ya hardware issues ho sakte hain. Neeche sabhi solutions simple steps me diye gaye hain. ✔ Step 1: Computer Restart Karein Ye sabse pehla aur sabse effective step hai. Kaise karein: Start Menu open karein Power icon par click karein “Restart” select karein Benefit: RAM free hoti hai Temporary errors remove ho jate hain System fresh start hota hai Step 2: Task Manager me Unwanted Programs Close Karein Agar kai saare apps background me chal rahe ho to...

Chapter 11 MS Excel Basics MS Excel ek spreadsheet software hai jo data ko organize, calculate aur analyze karne ke liye use hota hai. Microsoft Office suite ka ye ek powerful tool hai jisme rows, columns, formulas, tables aur charts ke through hum large data ko easily manage kar sakte hain. Is chapter me hum Excel ke basic features — Rows & Columns , Data Entry , aur Basic Formulas (SUM, AVERAGE) — ko step-by-step detail me samjhenge. 11.1 MS Excel Interface Overview (Basic Introduction) MS Excel open karte hi aap ek grid-type sheet dekhte ho, jisme chhote boxes hote hain jinhhe cells kaha jata hai. Har cell ka ek unique address hota hai, jaise A1, B2, C5 etc. Excel interface ke main parts: 1. Title Bar Yahan aapka file name dikhai deta hai. Default file name “Book1” hota hai. 2. Ribbon Tabs Ribbon ke andar multiple tabs hote hain: Home Insert Page Layout Formulas Data Review View In tabs me tools arranged hote hain jo data format, calculat...